Wireless Video Conference Microphone

Detail:

The emitter parameters
Carrier frequency range: 520 MHZ to 960 MHZ (depending on the applicable national standard)
RF power output: maximum 30 mw (depending on the applicable national standard)
Oscillation mode: PLL (digital frequency synthesizer)
Emission frequency stability: < 30 PPM
Dynamic range: 100 db (A) or higher
Frequency response: 50 hz to 15 KHZ
Maximum input pressure: 130 db SPL
Microphone cartridge: hand-held (moving coil), the meeting ` pockets (capacitive)
Power supply: 3 v 2 AA alkaline batteries
Working current: 110 ma
receiver
Carrier frequency range: 520 MHZ to 960 MHZ (depending on the applicable national standard)
Modulation mode: FM radio
Oscillation mode: PLL (digital frequency synthesizer)
Stray scattered suppression: 80 db or higher
Mirror inhibition: 80 db or higher
Sensitivity: 5 dbuv
Audio output level: equilibrium output: 250 mv / 600 Ω/non equilibrium output: 400 mv / 3 kg Ω
Working distance: 50-150 meters (depending on using the environment)
Working voltage: DC12-16 v
Working current: ma 800 or less